Search found 602 matches

by flatmax
Tue May 08, 2018 8:37 pm
Forum: Octo Sound Card for the Pi
Topic: Any hope for multiple I2S hats on Raspberry PI?
Replies: 1
Views: 372

Re: Any hope for multiple I2S hats on Raspberry PI?

Interesting idea !

Which card is going to be I2S bus master.
I would imagine it would be the Audio Injector .... but then you will have to run the other card with a 4x sample rate of the octo !

Matt
by flatmax
Tue May 08, 2018 8:31 pm
Forum: Octo Sound Card for the Pi
Topic: Octo not showing up on booting
Replies: 23
Views: 4375

Re: Octo not showing up on booting

You may find it better to use the modprobe commands to manually reload the card's drivers every boot. Here they are again : sudo modprobe -r snd_soc_audioinjector_octo_soundcard sudo modprobe -r snd_soc_cs42xx8_i2c sudo modprobe -r snd_soc_cs42xx8 sudo modprobe snd_soc_cs42xx8 sudo modprobe snd_soc_...
by flatmax
Tue May 08, 2018 8:28 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: AudioInjector for Zero low volume from all inputs
Replies: 1
Views: 474

Re: AudioInjector for Zero low volume from all inputs

Hi there, Is the microphone polarity correct ? The zero requires you to assemble the microphone - right. On page 2 of this thread, you can see how to connect the microphone with the correct polarity - can you please confirm it is correct ? http://forum.audioinjector.net/viewtopic.php?f=5&t=3084&star...
by flatmax
Tue May 08, 2018 8:25 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Headphone level
Replies: 1
Views: 469

Re: Headphone level

Hi there,

If you can use the Zero board, then you can connect through a pot. on the IO board. Otherwise, you need to use software.

Matt
by flatmax
Tue May 08, 2018 8:23 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Pot next to RCA jacks labeled "in" not adjust headphone
Replies: 2
Views: 488

Re: Pot next to RCA jacks labeled "in" not adjust headphone

Hi there,

On the zero version of this sound card, you can use an IO board to pass the headphone out through a pot to the connectors.

Otherwise you have to use software - such as alsamixer.

Matt
by flatmax
Tue May 08, 2018 8:22 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Potentiometers for Zero Soundcard
Replies: 1
Views: 261

Re: Potentiometers for Zero Soundcard

Hi Tom,

This type of potentiometer looks right :
https://www.ebay.com.au/i/323092650590


Matt
by flatmax
Tue May 08, 2018 8:15 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Setting WM8731 parameters
Replies: 1
Views: 281

Re: Setting WM8731 parameters

Hi there,

If you want to change the operation of the codec, probably the best place to alter register settings is in the codec driver :
https://github.com/raspberrypi/linux/bl ... s/wm8731.c

Matt
by flatmax
Tue May 08, 2018 8:14 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Cases or 3d printable case / CAD drawings?
Replies: 1
Views: 352

Re: Cases or 3d printable case / CAD drawings?

That would be awesome - unfortunately I don't have any 3D cad files.

Matt
by flatmax
Tue May 08, 2018 8:13 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: Jackd crash
Replies: 2
Views: 567

Re: Jackd crash

Is jackd running with real time priority ? Is it bumped up to the maximum ?

Matt
by flatmax
Tue May 08, 2018 8:11 pm
Forum: Stereo soundcard for the Raspberry Pi
Topic: ffmpeg failing
Replies: 7
Views: 962

Re: ffmpeg failing

Hi there, It is possible that the buffer being used is too small. It is likely that with USB there is some buffering provided for you. While ffmpeg is executing can you probe the buffer size it is using ? For example : cat /proc/asound/card0/pcm0p/sub0/hw_params Here is documentation on how to probe...